West Warwick, R.I.-based Amtrol, a manufacturer of hydronic heating and water systems, promoted Donald W. Reilly to chief financial officer and treasurer.

Carrier Corp. was invited to attend the U.S. Department of Housing and Urban Development's "Shared Visions" Economic Development Summit at the Pine Ridge Indian Reservation, S.D.

Washington Gas Light Co. and Thayer Capital Partners have formed Primary Investors, a holding company that will focus on buying HVAC contractors.

A.O. Smith Corp. completed its acquisition of MagneTek's worldwide electric motor operations.

Pameco Corp. named seven employees as associates of the year for fiscal year 1999.

The Northamerican Heating, Refrigeration and Airconditioning Wholesalers Association entered into an agreement to list online its surplus/obsolete refrigeration parts and controls exchanges.

Chicago-based manufacturer of commercial HVAC piping specialty products, unveiled its new Web site.

Fedders Corp. completed its acquisition of Sanford, N.C.-based Trion Inc., a manufacturer of indoor air quality products for cleanrooms, industrial/commercial and residential environments.

National Refrigerants Inc. of Philadelphia launched a new Web site.

Johnstone Supply of Indianapolis and Terre Haute, Ind., received the Growth 100 Award for the third year in a row from the Center for Entrepreneurship & Innovation at the Indiana University School of Business.